Chint CJ20-630A/380V AC contactor

The Chint CJ20-630A/380V AC contactor is an industrial control device specifically designed for high-power circuits. It is suitable for circuits with AC 50Hz, rated voltage of 380V, and rated current of 630A. It is mainly used for remotely connecting and disconnecting circuits, and can cooperate with thermal overload relays to realize motor protection.

1. Core Technical Parameters and Structural Design
2. الأداء الكهربائيChint AC contactor

التصنيف الحالي: 630أ (under AC-3 service category, it can control a three-phase squirrel-cage motor with a maximum power of approximately 315kW).

الحياة الكهربائية: 1 مليون مرة (under AC-3 duty system), and the mechanical life reaches 6 مليون مرة, reflecting high reliability.

الجهد لفائف: Supports AC 380V, 220V, 127V, إلخ., and DC 220V is optional, adapting to various control circuit requirements.

2. الميزات الهيكليةChint AC contactor coil NXC-25-220V

Arc Extinguishing System: Adopts a plastic grid arc extinguishing cover, which can quickly extinguish the arc generated when breaking large currents, ensuring the service life of contacts and breaking reliability.

Contact Material: Silver-based alloy contacts with excellent anti-welding performance, which can maintain stable conductive performance after long-term use.

طريقة التثبيت: Supports screw fixing or 35mm standard rail mounting (for some models), with an inclination not exceeding ±5°, adapting to various industrial environments.

3. Auxiliary Functionsسعر قاطع الدائرة الكهربائية CHINT

جهات الاتصال المساعدة: Specifications of 250A and above are equipped with 4 normally open and 2 normally closed auxiliary contacts as standard, which can expand control logic (such as interlocking, signal feedback).

Energy-saving Module: Models CJ20-63 and above can be optionally equipped with AC silent energy-saving (J) or AC/DC universal energy-saving (JZ) modules to reduce energy consumption and noise.

1. Application Scenarios and Installation Requirements
2. التطبيقات النموذجية

Industrial Drive: Motor control in large factories (such as water pumps, المشجعين, الضواغط), supporting frequent start-stop and forward-reverse operations.

Power Distribution System: Cooperates with circuit breakers and fuses to build highly reliable power distribution nodes.

بيئات خاصة: Adapts to an ambient temperature of -5℃~+40℃, altitude ≤2000m, and relative humidity ≤90% (no condensation), meeting the needs of most industrial scenarios.

2. Installation Specifications

متطلبات الأسلاك: The main contacts should use copper cables with a cross-sectional area of ≥185mm² or 50×5mm copper bars, and the tightening torque should reach 14N·m to ensure low-resistance connection.

Environmental Protection: Avoid installation in environments with strong vibration, flammable gases or corrosive media, and it is recommended to reserve sufficient heat dissipation space.

ثالثا. Troubleshooting and Maintenance Suggestions

1. Common Problems and Solutions

Contactor Not Pulling In: Check if the coil voltage is normal (needs to reach 85%~110% of the rated value), clean the oil stains on the iron core pole surface, and eliminate mechanical jamming.

Contact Welding: If the load side is short-circuited or the operation frequency is too high, resulting in contact adhesion, the contacts need to be replaced and the circuit protection device should be checked.

Coil Overheating: Avoid voltage fluctuations exceeding ±10%, ensure the ambient temperature does not exceed +40℃, and replace the suitable coil if necessary.

2. دورة الصيانة

Daily Inspection: Clean the dust on the shell monthly, and check the contact wear (replace when the silver layer thickness is <0.5مم).

Annual Maintenance: Test the contact resistance (should be ≤50μΩ), verify the integrity of the arc extinguishing cover, and tighten all terminals.

1. الشهادة والامتثال

This model has passed China Compulsory Certification (CCC certification), with the certificate number 2002010304009742, valid until November 8, 2020. It is recommended to confirm whether the current product still meets the latest industry standards (such as GB/T 14048.4-2010) through Chint’s official website or authorized dealers.

1. Purchase and Alternative Solutions
2. Price Reference

The price of official channels (such as Chint Electric Mall) هو على وشك 5257 يوان لكل وحدة, and the quotation from third-party platforms (واتس اب: 0086-13811255435) is about yuan per unit. Attention should be paid to configuration differences (such as the number of auxiliary contacts, whether it contains an energy-saving module).

2. Alternative Models

NC2 Series: Chint’s new generation contactor (such as NC2-630) adopts a modular design, supports more flexible expansion of auxiliary functions, and the mechanical life is increased to 10 مليون مرة, which can be used as an upgrade option.

1. Safety Warnings
2. Operation Specifications

Power must be cut off during installation and maintenance, and it should be operated by professional electricians to avoid the risk of electric shock.

It is prohibited to use in flammable and explosive environments to prevent explosions caused by arcs.

2. المتطلبات البيئية

Waste products must be disposed of according to electronic waste standards to avoid environmental pollution.

The core technical parameters of the Chint CJ20-630A/380V AC contactor are sorted out below, combining official data and industry standards:

1. Electrical Performance Parameters

1. Structure and Material Parameters

ثالثا. Environmental Adaptability Parameters

1. Shape and Physical Parameters

1. Key Performance Indicators
2. Action Characteristics

Pull-in voltage: 85%~110% of rated voltage<br>

Release voltage: 20%~75% of rated voltage (for ordinary type) or 10%~75% (for energy-saving type).

2. Insulation Performance

Power frequency withstand voltage: 3000V/1min between main contacts, 2500V/1min between main contacts and coil.

1. Typical Application Parameters

سابعا. ملاحظات الاستخدام

1. مواصفات الأسلاك

The main circuit terminals must be tightened with a torque wrench according to 14N·m to avoid heating caused by virtual connection.

2. دورة الصيانة

Check the contact wear every quarter (replace when the silver layer thickness is <0.5مم), and verify the integrity of the arc extinguishing cover every year.

3. Alternative Solutions

Upgrade model: Chint NC2-630 contactor, with mechanical life increased to 10 مليون مرة, supporting modular expansion.